纯php登录验证demo

发布时间：2020-12-13 22:18:10 所属栏目：PHP教程来源：网络整理

导读：!-- html -- 1 ! DOCTYPE html 2 html lang ="en" 3 head 4 meta charset ="UTF-8" / 5 title Document / title 6 / head 7 body 8 form action ="check.php" method ="post" 9 p 10 input type ="text" name ="username" value ="用户名" 11 / p 12 p 13 in




<!-- html -->

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8" />
 5     <title>Document</title>
 6 </head>
 7 <body>
 8     <form action="check.php" method="post">
 9         <p>
10             <input type="text" name="username" value="用户名">
11         </p>
12         <p>
13             <input type="password" name="pwd" value="密码" placeholder="密码">
14         </p>
15         <p>
16             <input type="submit">
17         </p>
18     </form>
19 </body>
20 </html>

 1 <?php
 2     $username = $_POST[‘username‘];
 3     $password = $_POST[‘pwd‘];
 4 
 5     $link = mysqli_connect(‘localhost:3308‘,‘root‘,‘123456‘,‘mytest1‘);
 6     mysqli_set_charset($link,‘utf8‘);
 7 
 8     $result = mysqli_query($link,"SELECT * FROM userinfo WHERE username=‘{$username}‘ AND password=‘{$password}‘");
 9     $num = mysqli_num_rows($result); // 通过result的长度(数量0or1) 来判断是否有查到数据
10         // print_r($result);
11     $row = mysqli_fetch_array($result); //fetch数据，以便查找需要的具体信息
12     if($num == 1){
13         echo "您已经成功登陆，";
14         echo ($row[‘isvip‘])?‘我们敬爱的会员！‘: ‘你好！‘;
15     }else {
16         print_r(‘用户名或密码错误‘);
17     }
18 ?>

（编辑：李大同）

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